// JScript File

function clearField(objField, strDefault) {

    if (document.getElementById(objField.id).value == strDefault)
        document.getElementById(objField.id).value = "";

}

function validEmail(txtEmail) {
    strPattern = /\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*/;
    
    strEmail = document.getElementById(txtEmail).value;
    
    if (strPattern.test(strEmail)) {
        return true;
    } else {
        alert("Please enter a valid email address.");
        return false;
    }
}

function validEmails() {
    strPattern = /\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*/;
    
    strEmails = document.getElementById('ucCompetition_txtFriends').value;
    
    arrEmails = strEmails.split("\n");
    
    if (arrEmails[0] == "invite your friends - one per line - and increase your chances")
        return true;
    
    for (i=0; i < arrEmails.length;i++) {
        //alert("(" + arrEmails[i] + ") = " + strPattern.test(arrEmails[i]));
        if (arrEmails[i].trim() == '' || strPattern.test(arrEmails[i])) {
            
        } else {
            alert("Please enter valid friend's emails - one per line");
            return false;
        }
    }
    
    return true;
}